Costco (COST): analysis and signal as of August 30, 2026

Published on September 3, 2026 at 19:19 · Updated on September 4, 2026 at 03:43 · by Aurélien Ambert, QDNA

Exchange : Nasdaq · Sector : Distribution

In short

The signal is neutral with a score of 1.5 out of 1, and the main reason lies in the valuation gap against a restrictive monetary environment that leaves no room for error.

Current signal: no signal (single draw, outside the three-draw protocol)
Deterministic score: +1.0 → signal expected by the scale : weak (September 10, 2026)
Layers: screening : FORT, fundamentals : neutral, price : neutral, risks : neutral

Triggered rules

Rule	Weight
favors a high and durable return on invested capital (ROIC), a marker of a lasting moat	+2.0
penalizes a PEG above 2, the anticipated growth is overpaid (overvalued fast grower)	-1.5
penalizes direct holding of US securities in a CTO (US estate tax at death), favors a UCITS ETF domiciled in IE	-1.0
favors high gross profitability (gross profit / assets), a robust predictor of returns	+1.0
moderately favors an asset with robust operating profitability (RMW factor), cross-check with accounting quality (possible manipulation)	+0.5

Thesis

The three layers of analysis converge toward neutral with a medium confidence. The operational quality of the retailer is real, but the valuation at 45-50x earnings leaves no room for error with a Fed at 3.50-3.75 % and a deteriorated momentum over six months. The fiscal quarter closing at the end of August 2026 provides a near-term catalyst to settle the matter with fresh data.

Bull case

Growth is in the double digits, self-funded and recurring. Diluted earnings per stand at 4.93 USD, up 15 % year-on-year, with comparable sales at +9.8 %, membership revenues at +10.7 % and the digital segment at +21.5 %. The retailer captures the shift of consumers toward discount in a disrupted pricing environment, with marginal short pressure (1.66 % of the float) and a median analyst target of 1,100 USD, representing about +16 %.

Bear case

The duration valuation has no catch-up catalyst. The implied PER stands between 45 and 50x and the EV/EBITDA between 25 and 28x, figures not verified in real time, while the Fed under Warsh at 3.50-3.75 % offers no marked retreat in long-term rates. The momentum over six months is negative, with an intraday at -5.0 % and a price below the 200-session moving average by 1.3 %. The global renewal rate recedes slightly, to 89.8 % versus 90.2 %, and the catalog partially exposes the stock to the penalized discretionary consumption sector.

Scenarios

Bullish scenario (25 %): target 1,100 USD, the median target of the 39 analysts, corresponding to +16 %. Central scenario (50 %): consolidation between 880 and 1,000 USD, multiple maintained without revision. Bearish scenario (25 %): slide toward 740 USD, the analyst low bound, maximum loss of about -22 %.

Risks

The stock trades at a price of 945.47 USD, with a global renewal rate in slight retreat and a deteriorated technical momentum over six months. A break of the 200-session moving average would invalidate the thesis. A marked deterioration of the renewal rate or a persistently more restrictive rate environment would amplify the downward revision of the multiple. The sensitivity of the stock to discretionary consumption adds a cyclical risk factor.

Market positioning (short sellers)

Short interest / shares outstanding: 1.72 %
Days to cover: 4.09
Settlement date: 2026-08-31
Source: FINRA (disseminated on 2026-09-12)

Market information published by FINRA (consolidated short interest, all venues), no directional comment.

Upcoming catalysts

Date	Description
September 24, 2026	Résultats T4 fiscal 2026

Signal history (last 12 months)

Date	Signal	New fact
August 30, 2026	no signal (single draw, outside the three-draw protocol)	unchanged

Frequently asked questions

What is the current signal on this stock?

The signal is neutral, with a score of 1.5 out of 1 and a vote of 1/1. The three layers of analysis converge toward neutral with a medium confidence, due to a real operational quality but a valuation at 45-50x earnings that leaves no room for error in a monetary environment at 3.50-3.75 %.

What are the factors favorable to an upside?

Diluted earnings per stand at 4.93 USD, up 15 % year-on-year. Comparable sales progress by 9.8 %, membership revenues by 10.7 % and the digital segment by 21.5 %. Short pressure remains marginal, at 1.66 % of the float, and the median analyst target stands at 1,100 USD.

What are the main identified risks?

The valuation at 45-50x earnings leaves no room for error against a Fed at 3.50-3.75 %. The momentum over six months is negative, with an intraday at -5.0 % and a price below the 200-session moving average. The global renewal rate recedes to 89.8 % versus 90.2 %.

What scenarios are envisaged by the analysis?

Bullish scenario (25 %) toward 1,100 USD, central scenario (50 %) of consolidation between 880 and 1,000 USD, and bearish scenario (25 %) toward 740 USD, with a maximum loss of about -22 %. Probabilities and targets are reproduced as they stand from the original analysis.

What element could invalidate the thesis?

A break of the 200-session moving average would invalidate the thesis, as would a marked deterioration of the renewal rate or a downward revision of the multiple in a persistently more restrictive rate environment. The near-term catalyst remains the fiscal quarter closing at the end of August 2026.

Sources

The official filings below are the issuer's own, matched to this stock by its identifier (LEI, CIK or ISIN). The figures quoted above come from an automated arbitration: they have not been re-checked one by one.

July 8, 2026 — 8.01 Other Events; 9.01 Financial Statements and Exhibits (SEC · 8-K)
June 3, 2026 — 10-Q (SEC · 10-Q)
May 28, 2026 — 2.02 Results of Operations and Financial Condition; 9.01 Financial Statements and Exhibits (SEC · 8-K)
April 15, 2026 — 8.01 Other Events; 9.01 Financial Statements and Exhibits (SEC · 8-K)
March 11, 2026 — 10-Q (SEC · 10-Q)

Automated AI analysis: limitations and transparency

This content is an automated analysis produced using artificial intelligence. Personal analysis for information purposes — no personalised investment advice. MMR content consists of general research. It does not take account of your financial circumstances, objectives or risk tolerance. Data, analyses and results, including those produced using artificial intelligence, may contain errors, be incomplete or become outdated. No return or outcome is guaranteed. All investments carry a risk of partial or total loss of capital. Past performance and simulations do not predict future results. Before making any decision, check information against original sources and, where necessary, consult an authorised professional. You remain responsible for your investment decisions. This notice does not exclude or limit any liability that cannot legally be excluded or limited.
Tool and analysis: QDNA, Aurélien Ambert.
Analysis (arbitration) completed on August 30, 2026; this page was completed on September 4, 2026 at 03:43 (UTC).
Interests: no position in the stock analysed (COST) is recorded in the data consulted on September 12, 2026 (UTC). This does not confirm the absence of holdings or other interests. The situation at the analysis publication date has not been reconstructed.
This declaration covers only recorded positions in this stock; it is not an exhaustive verification of other interests or remuneration.
Methodology: analysis chain, score formula and scale described on the public methodology page.
Analysis horizon: 2035.